It's going to get cold in Tennessee. Meteorologists predict freezing temperatures for much of the state. Here's the latest.

“These events never happen over the Antarctic,” says Aditi Sheshadri, an atmospheric scientist at Stanford University. And the absence of these polar vortex disturbances in the Southern ...

The polar vortex is a low-pressure system of cold air that swirls above Earth’s poles. There’s one over the South Pole in Antarctica – but for this story, we’ll be focusing on the one ...

frigid air pushes southward toward the U.S. What's the difference between an Arctic air mass and the polar vortex? Arctic air masses originate over the Arctic or Antarctic regions and are very cold.

Related: Bizarre polar vortex over Antarctica delayed ozone hole opening, scientists say The polar vortex is an area of low pressure and cold air that circulates around the North and South poles.

For example, during the CP (Central Pacific) La Niña phase, reduced stratospheric ozone weakens vertical heat fluxes, stabilizing the polar vortex ... is happening over Antarctica, etc.

A polar vortex is a large area of low-pressure and cold air that circulates around the Earth’s poles, typically confined to the Arctic or Antarctic regions. This swirling mass of frigid air is held in ...

A polar vortex is a large area of low-pressure and cold air that circulates around the Earth’s poles, typically confined to the Arctic or Antarctic regions. This swirling mass of frigid air is held in ...

Where is the snowiest place on Earth? Snow enthusiasts have been discussing it for a long time, but there’s no consensus.